What Is the Difference Between Farmed and Wild-Caught Fish?

The difference comes from how the fish lives. Farmed fish live in a confined area and are fed regularly; they get less muscle activity and accumulate more fat. Wild-caught fish are constantly moving and feed according to the season, so their muscles are firmer and their fat content varies throughout the year. In farmed fish, fat is mostly concentrated in the belly area, where it is visible in a cross-section. This is not a bad thing; it simply needs to be taken into account when cooking.

A few clues can help at the fish counter. Farmed fish tend to be very similar in size and the batch looks uniform; fish caught in the wild vary more in size and color. The fins of farmed fish are more even and intact, while wild fish may show signs of wear. When you feel the belly, farmed fish feel softer. The surest way is still to ask; the fish counter is required to provide this information, and it is expected to appear on the label. Looking at a cross-section can also help: a yellowish layer of fat is clearly visible around the belly cavity of farmed fish.

The two products behave differently in the kitchen. Because farmed fish are fattier, they are more forgiving on the grill and in the oven and do not dry out easily; however, their flesh is soft, so it is more likely to break apart on the grill and should not be turned often. Wild-caught fish have firmer flesh and hold their shape, but if they are low in fat, they dry out quickly, so keep the cooking time short. Dripping fat from farmed fish can flare up the grill; if that happens, move the piece to the cooler edge.

You can also manage the difference in flavor. Since farmed fish have a milder flavor, seasoning, lemon, and herbs stand out more; this is an advantage in marinades and sauced recipes. Wild-caught fish have a stronger flavor and need less added: salt, olive oil, and lemon are often enough, while heavy seasoning can overpower them. That is why the amount of seasoning should change when the same recipe is used for both products; if the recipe is left as is, the result may surprise you with one of those two products.

The price difference follows from these factors and does not always indicate quality. Farmed fish are available year-round, have a standard size, and are relatively steady in price, which is useful when planning a meal in advance. The price of wild-caught fish varies with the season and the catch. Choose according to the dish: farmed fish work well baked whole with vegetables, while wild-caught fish make a difference when simply grilled. The freshness criteria are the same for both. The freshness signs are the same too: clear eyes, bright red gills, and flesh that springs back when pressed.